Package gavo :: Package base :: Module meta :: Class MetaAttribute

Class MetaAttribute

          object --+    
                   |    
attrdef.AttributeDef --+
                       |
                      MetaAttribute

An attribute magically inserting meta values to Structures mixing in MetaMixin.

We don't want to keep metadata itself in structures for performance reasons, so we define a parser of our own in here.

Instance Methods

__init__(self, description='Metadata')
x.__init__(...) initializes x; see help(type(x)) for signature source code

feedObject(self, instance, value)

source code

getCopy(self, parent, newParent, ctx)
creates a deep copy of the current meta dictionary and returns it.

source code

create(self, parent, ctx, name)

source code

makeUserDoc(self)

source code

iterEvents(self, instance)

source code

Inherited from attrdef.AttributeDef: doCallbacks, feed, iterParentMethods

Inherited from object: __delattr__, __format__, __getattribute__, __hash__, __new__, __reduce__, __reduce_ex__, __repr__, __setattr__, __sizeof__, __str__, __subclasshook__

Class Variables
	typedesc = `'Metadata'`
Inherited from `attrdef.AttributeDef`: `typeDesc_`

Properties
	default_
Inherited from `object`: `__class__`

Method Details

init(self, description=`'Metadata'`)
(Constructor)

source code

x.__init__(...) initializes x; see help(type(x)) for signature

Overrides: object.__init__: (inherited documentation)

feedObject(self, instance, value)

source code

Overrides: attrdef.AttributeDef.feedObject

getCopy(self, parent, newParent, ctx)

source code

creates a deep copy of the current meta dictionary and returns it.

This is used when a MetaMixin's attribute is set to copyable and a meta carrier is copied. As there's currently no way to make the _metaAttr copyable, this isn't called by itself. If you must, you can manually call this (_metaAttr.getCopy), but that'd really be an indication the interface needs changes.

Note that the copying semantics is a bit funky: Copied values remain, but on write, sequences are replaced rather than added to.

Overrides: attrdef.AttributeDef.getCopy

makeUserDoc(self)

source code

Overrides: attrdef.AttributeDef.makeUserDoc

Property Details

default_

Get Method:: unreachable.default_(self)

Class MetaAttribute

__init__(self, description='Metadata') (Constructor)

feedObject(self, instance, value)

getCopy(self, parent, newParent, ctx)

makeUserDoc(self)

default_

init(self, description=`'Metadata'`)
(Constructor)